Oct - Dec 2009 • Vol. No. 32 Issue No. 2 • - L&T Construction

In the crushed coal stockpile, coal will be
carried by trunk conveyor and stacked by
Stacker cum Reclaimer. In the reclaiming
mode, Stacker cum Reclaimer will reclaim coal
from stockpile and will discharge on to trunk
conveyor. Also in case of emergency when
Stacker cum Reclaimer is out of operation and
coal is needed in the bunker from stockpile,
dozers will be used to supplement coal to either
of the 2 Reclaim Hoppers, wherefrom coal can
be fed to the bunkers.
Both the direct path as well as two reclaim paths
will convey the coal to bunker conveyors. Each
of the bunker conveyor is provided with
Travelling Trippers through which the bunkers
of Unit 4 & 5 will be fed.
Track hopper
The track hopper complex is 210m long with a
holding capacity of 4000 t with maintenance bays at
both ends along with erection hatch, staircase, etc.
The live railway lines on one side and ash-water pipe
rake on the other side of the track hopper location
made it very critical for the excavation and
construction activities. In order to tackle the constraint
and to meet the deadline, innovative arrangements
were made to cast 5m high wall at one lift to reduce
the casting time.
ECC Concord Oct-Dec 09 30
Conveying system
Conveyor Capacity (Rated/ Designed) 1600 tph
Number of Conveyors 25
Belt Speed 3.2 m/ sec
Total length 4.6 km
Belt Width 1400mm
Type of Belt Nylon/ Nylon
Inside view of Track Hopper – during wagon unloading
Building structures
Track Hopper 1 no, 210 m long
Crusher house 1 no
Transfer Points (over ground) 4 nos
Transfer Points (under ground) 4 nos
Reclaim Hopper 2 nos
Electric House 3 nos
Pump house 2 nos
Major quantities
Excavation 54000 cu.m
PCC 4200 cu.m
RCC 30000 cu.m
Shuttering 120000 sq.m
Rebar 4000 t
Structural 3500 t
Sheeting 32000 sq.m